Graduate School of Public Health, San Diego State University, San Diego, California.
The Santa Fe Institute, Santa Fe, New Mexico.
Am J Prev Med. 2014 Jul;47(1):73-6. doi: 10.1016/j.amepre.2014.02.003. Epub 2014 Apr 18.
Biological clocks govern numerous aspects of human health, including weekly clocks-called circaseptan rhythms-that typically include early-week spikes for many illnesses.
To determine whether contemplations for healthy behaviors also follow circaseptan rhythms.
We assessed healthy contemplations by monitoring Google search queries (2005-2012) in the U.S. that included the word healthy and were Google classified as health-related (e.g., healthy diet). A wavelet analysis was used in 2013 to isolate the circaseptan rhythm, with the resulting series compared by estimating ratios of relative query volume (healthy versus all queries) each day (e.g., (Monday-Wednesday)/Wednesday).
Healthy searches peaked on Monday and Tuesday, thereafter declining until rebounding modestly on Sunday. Monday and Tuesday were statistically indistinguishable (t=1.22, p=0.22), but their combined mean had 30% (99% CI=29, 32) more healthy queries than the combined mean for Wednesday-Sunday. Monday and Tuesday query volume was 3% (99% CI=2, 5) greater than Wednesday, 15% (99% CI=13, 17) greater than Thursday, 49% (99% CI=46, 52) greater than Friday, 80% (99% CI=76, 84) greater than Saturday, and 29% (99% CI=27, 31) greater than Sunday. We explored media-based (priming) motivations for these patterns and they were consistently rejected.
Just as many illnesses have a weekly clock, so do healthy considerations. Discovery of these rhythms opens the door for a new agenda in preventive medicine, including implications for hypothesis development, research strategies to further explore these rhythms, and interventions to exploit daily cycles in healthy considerations.
生物节律控制着人类健康的诸多方面，包括每周的节律——circaseptan 节律，这些节律通常包括许多疾病在周初的高发。
确定健康行为的思考是否也遵循 circaseptan 节律。
我们通过监测美国 2005 年至 2012 年期间包含单词“健康”且被谷歌归类为健康相关的谷歌搜索查询（如健康饮食）来评估健康思考。2013 年使用小波分析来分离 circaseptan 节律，通过每天估计相对查询量的比例（健康查询与所有查询的比例）来比较所得序列（例如，（周一至周三）/周三）。
健康搜索在周一和周二达到高峰，此后下降，直到周日略有反弹。周一和周二在统计学上没有差异（t=1.22，p=0.22），但它们的组合平均值比周三至周日的组合平均值多 30%（99%CI=29，32）的健康查询。周一和周二的查询量比周三高 3%（99%CI=2，5），比周四高 15%（99%CI=13，17），比周五高 49%（99%CI=46，52），比周六高 80%（99%CI=76，84），比周日高 29%（99%CI=27，31）。我们探讨了这些模式的基于媒体（启动）的动机，但这些动机都被一致否定。
正如许多疾病有每周的节律一样，健康的考虑也有每周的节律。这些节律的发现为预防医学开辟了一个新的议程，包括对假设发展的影响、进一步探索这些节律的研究策略，以及利用健康考虑的日常周期的干预措施。
